Make rpmbuild on CentOS 8 work again with new cmake.
Make rpmbuild on CentOS 8 work again with new cmake.

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa